I will mark u brainliest answee this-------Delhi Iron pillar not corroding since many years? Why
Answers
Hey Ma8,
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# the iron pillar near the qutub minar in delhi was built more than 1600 years ago by the iron workers of india.
=>> they had developed a process which prevented iron from rusting
# for its quality of rust resistence it has been examined by scienctists
from all parts of the world
# iron pillar is 8 m high and weights 6000 kg
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The pillar was manufactured by the forge welding of pieces of wrought iron. In a report published in the journal Current Science, R. Balasubramaniam of the IIT Kanpur explains how the pillar's resistance to corrosion is due to a passive protective film at the iron-rust interface. The presence of second-phase particles (slag and unreduced iron oxides) in the microstructure of the iron, that of high amounts of phosphorus in the metal, and the alternate wetting and drying existing under atmospheric conditions are the three main factors in the three-stage formation of that protective passive film